Hi Nidheesh
Do keep us up to date with your progress. While you are waiting for the new transformer there are several things you can do to get a better understanding of whatever it is that is causing the problems you are seeing. You will find a general…
Hi Vincent,
Thanks your your interest in UCC256301. I will check if we have any guidelines for LLC transformer design. May I ask what made you consider using half bridge LLC topology for 1kW design? This will require quite large magnetics. You could…
Part Number: UCC3895 Other Parts Discussed in Thread: UCC28951 , UCC28950 , UCC2895
Hello TI. I am stuck with my DC-DC converter based on UCC3895. Basically, my circuit is almost the same as in the datasheet. The problem is that under light load (~2W…
Hi Brian, For this input voltage range and power level, I would recommend a phase shifted full bridge instead of LLC. Take a look at UCC28951-Q1: www.ti.com/.../description. For battery chargers, you typically have two feedback loops: one to regulate…
Hello Paul
Yes you can. Even if the controller is operated closed loop - when the CS pin reaches the cycle-by-cycle current limit point the output voltage will drop and the comp pin will saturate high - exactly as it is doing in your open loop test…
Other Parts Discussed in Thread: UCC256302 , UCC28951-Q1 Hi,
Thanks for your support, I need to design converter from (400vdc to 12A/400W ).Can you share Half Bridge LLC resonant Converter Design calculation sheet.
Thanks & regards,
M.yasoda.
Hi Kuo John,
Thank you for your interest in UCC256304. Generally, half bridge LLC is not recommended for nominal power ranges near 1 kW as the resonant current can become quite high. Typically a full bridge topology of some flavor is used in the 1…
Part Number: UCC28950 Other Parts Discussed in Thread: UCC28951 Hi, Could you tell me about UCC28950 switching operation? Is UCC28950 able to turn on "OUTA and OUTD" / "OUTB and OUTC" at the same time? Customer wants to know if this device can perform…
Hi Brian,
Thanks for your interest in UCC256301. Becuase the peak output power level is almost 2kW, I would suggest a phase shifted full bridge such as UCC28951-Q1. Phase shifted full bridge also features ZVS and is capable of high efficiency. There…
Hello Aneesh
If you are building a battery charger then you need a CI/CV characteristic. This cannot be achieved if you use only a current sensor on the input line for a few reasons.
1/ The current limit point is not well defined - typically it will…
